Breathing only through their noses—and having big hearts—give them a boost
The Tufts video series Ever Wonder features faculty and other experts answering questions for the curious about all manner of topics—from how parrots talk to why cats purr.
You can view the entire series at http://everwonder.tufts.edu.
Steffan Hacker can be reached at steffan.hacker@tufts.edu.
